EP0230483A1 - Procédé pour uniformiser des particules de dispersion et machine pour exécuter ce procédé - Google Patents

Procédé pour uniformiser des particules de dispersion et machine pour exécuter ce procédé Download PDF

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Publication number
EP0230483A1
EP0230483A1 EP86100658A EP86100658A EP0230483A1 EP 0230483 A1 EP0230483 A1 EP 0230483A1 EP 86100658 A EP86100658 A EP 86100658A EP 86100658 A EP86100658 A EP 86100658A EP 0230483 A1 EP0230483 A1 EP 0230483A1
Authority
EP
European Patent Office
Prior art keywords
fleece
housing
spreading width
particle
closed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86100658A
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German (de)
English (en)
Other versions
EP0230483B1 (fr
Inventor
Andrej Buksek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Schenck AG
Original Assignee
Carl Schenck AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carl Schenck AG filed Critical Carl Schenck AG
Priority to DE8686100658T priority Critical patent/DE3669838D1/de
Priority to EP86100658A priority patent/EP0230483B1/fr
Priority to US07/001,706 priority patent/US4703783A/en
Publication of EP0230483A1 publication Critical patent/EP0230483A1/fr
Application granted granted Critical
Publication of EP0230483B1 publication Critical patent/EP0230483B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
    • B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
    • B27N3/08—Moulding or pressing
    • B27N3/10—Moulding of mats
    • B27N3/14—Distributing or orienting the particles or fibres
    • B27N3/146—Controlling mat weight distribution

Definitions

  • the invention relates to a method for equalizing scattering particles according to a target density distribution in a particle fleece transverse to the direction of progress of the fleece and a device for carrying out the method by changing the amount in a particle stream to be scattered as a fleece depending on a target density distribution in the fleece over its scattering width, in particular a chip fleece Production of chipboard.
  • the particle material can consist of wood chips of normal dimensions, as are required for the production of chipboard, or of large-scale chips such as wafers and strands and also of mixtures of these chips with one another or with wood fibers;
  • the particles to be scattered can also consist of plastic granules.
  • DE-PS 1 133 532 has disclosed a device for forming a particle stream of constant thickness, in particular from wood particles mixed with binders, such as shavings, with several being distributed over the width of a conveyor track and lying in front of a metering device with respect to its conveying direction
  • Response devices are provided which, when a certain height of a particle cluster in the areas lying in front of them are exceeded, are effective via controls known per se on a distribution device for equalizing the accumulation height differences of the particle cluster across the conveyor track.
  • Such a device can only be used if a correspondingly large quantity is available as a control quantity for the purpose of homogenizing the material to be dosed before dosing. It is always mixed new material to be dosed with existing material.
  • the material consists of particles which have been provided with binders at different times.
  • cement-provided particles which are also moistened are brought together with moist particles which have only been freshly provided with cement as a binder, and what influence such a particle mixture has on the material to be pressed after the cement has hardened Plate.
  • particles already provided with hardened binder can no longer bond with the particles freshly provided with binder, so that despite the same density in the nonwoven area, the finished board becomes a reject due to the lack of bond.
  • This disadvantage of the prior art which is illustrated using the example of a board with a cement bond, can also be readily transferred to particle boards, as defined in more detail above, and to particle boards in which gypsum produces the bond, or to boards made of granulate.
  • DE-PS 947 640 describes a method and a device for producing chipboard or the like, the chip material being applied to a roller table by an endless belt, chain grate or the like, or to sheet metal supports placed thereon, and the fleece thus obtained after stripping applied too much Good is formed into pieces under previous or subsequent pre-pressing, in which, in order to achieve good-quality items, the good is subjected to continuous automatic weight control before or after its pre-pressing and its height is adjusted accordingly by the scraper, which is height-controlled from the balance.
  • This method also works with an excess of particles, particles being removed from the surface of the material again depending on the fleece weight, that is to say after the particles have been scattered, in order to achieve the same weight.
  • a uniform density distribution can also not be achieved when mixed material, for example particles from different types of wood or mixed with granules are used, because due to the different specific weight in the particle mixture and small differences in the wood mixture, for example, a combination of several wood particles higher specific weight on the one hand and on the other hand a combination of plastic granules of lower specific weight inevitably results in a finished plate over the spread, the density of which is not uniformly distributed over the entire plate.
  • the object of the invention is to propose a method and a device to achieve a desired density in a particle fleece if the amount of particles to be scattered is greater than the amount of particles required to achieve the desired density without the excess amount being returned is mixed with the fleece to be spread or sprinkled on.
  • This task is based on a method for equalizing scattering particles scattered in excess according to a target density distribution in a particle fleece transverse to the direction of progress of the fleece solved with the characterizing features of claim 1.
  • an inventive housing is disclosed with the characterizing features of claim 2, the composition of which allows the particle flow to be deposited unaffectedly as a fleece, and the required influence due to the desired density over the scattering width only affects the edge area of the expansion the still closed particle flow is restricted in the direction of the fleece; by the arrangement of slides according to the invention, with which a housing can be closed or opened, an intermediate storage of compensating material is created, which is fed directly to a reprocessing in the case of an excess, without a deposition in the fleece having been necessary beforehand and with a shortage an immediate one Addition to the particle fleece to be scattered achieved.
  • Claims 4 and 5 protect another type of conveyor devices which are arranged in the housing according to the invention.
  • Claim 6 shows a certain way in which excess material can be reused without being deposited in the fleece.
  • Claim 7 places a particularly advantageous embodiment of the housing according to the invention under protection, which is particularly suitable for certain fields of application and when using a screw conveyor as a conveyor, since no residues can remain in the housing.
  • Claim 9 provides an actuator of the slide according to the measured actual values in the fleece in comparison with the target values under protection.
  • the slide is adjusted in an inventive manner via the actual values measured in the fleece with the aid of a computer, so that the particle fleece immediately following it already has the desired values during a subsequent measurement in the fleece.
  • particles 5 to be scattered are brought into the interior of the bundle via an entry 2.
  • the particles can be wood or plastic chips, which are provided with already processed urea glue or dry particles such as plaster or cement for mutual solidification of the chips when exposed to moisture present in the chips; Mixtures of wood and plastic shavings can also be introduced into the bunker, the plastic shavings causing the wood shavings to solidify when a heated press presses and presses the fleece fleece together on the individual floors during the production of plate-shaped objects.
  • the bunker 1 also has a floor conveyor 3, which closes the bunker at the bottom and with which the particles entered are fed to a scratch discharge 4 as a result of the movement of the floor conveyor 3 in the direction of the arrow.
  • the scratch discharge 4 is in the execution play from a row of scratching rollers 6 arranged one above the other, which remove particles from the particle supply in accordance with their rotation in the direction of the arrow and feed them to a distribution device 7.
  • a closed particle stream is created which moves between the front deflection 9 of the floor conveyor 3 and a housing 10 which, like the scraper rollers 6, extends over the entire width of the bunker.
  • the distance between the front deflection 9 of the floor band 3 and the housing 10 is such that a large part of the closed particle flow can be moved through this opening unhindered.
  • the amount of the closed particle stream 8 is such that it has an excess in relation to the endless chip fleece to be deposited on a forming belt 11.
  • the housing 10 which contains a conveying device 12 and which extends over the entire bunker width and thus also over the spreading width of the later fleece, serves for the metered removal and addition of particles from the closed particle stream 8.
  • the housing 10 and the conveying device 12 located therein which are explained in more detail in the following figures, meter the distribution device 7, in accordance with the information coming from a density measuring device 13, via a computer 14 in addition to the closed particle flow 8 to further particles.
  • the several housings 10 and several conveying devices 12 shown in FIG. 1 show at which points the dispensing and adding devices consisting of housing 10 conveying device 12 and openings in the housing 10 which can be closed by slides can be arranged in the closed particle stream 8. If the housing 10 is located in the region of the front deflection 9 of the floor band 3, no further housings 10 are to be arranged in the further flow of the particles.
  • a single housing 10 can be arranged below the front deflection 9, which doses the required correct amount for a target density distribution in the nonwoven according to the actual values determined by the density measuring device 13 from the excess of the closed particle flow; or according to the invention, each opening roller 15 can be provided with a housing 10 which also doses the desired density for the fleece from the excess quantity, or there can be a housing 10 with a conveying device 12 contained therein at the end of each strand of transfer rollers 16 from the excess quantity, as explained above, pass on particle quantities corresponding to the target density to distribution rollers 17.
  • the arrangement according to the invention of the housing 10 with conveying devices 12 at the end of the transfer rollers 16 is advantageous, for example, when there is a risk of segregation in the course of the particle flow until it reaches the scraper rollers 6 as far as the opening rollers 17; this is particularly the case with very different specific weights between the binder and the particles to be bonded if the binders are not yet adhering to the particles to be bonded.
  • the particles to be connected that is to say chips, are already coated by this in the bunker 1, so that segregation between these components cannot take place.
  • the housing 10 is particularly preferably to be arranged opposite the front deflection 9.
  • Forming band 11 can also be provided with a series of mutually overlapping documents 18 which, in the case of their flexible design, carry headers 19.
  • the fleece 20 located on the documents 18 or the forming belt 11, which has the desired density over its scattering width, is then further processed into plate-shaped materials.
  • FIG. 2 schematically shows the position of slides 22 which, in accordance with the fleece course 23 present in this area, allow excess particles 5 to enter the housing 10 via the spreading width 24 and thus feed them to a screw conveyor 25.
  • Adding slides 26 allow particles to be added to the fleece 20 from the housing 10 via the rotating screw conveyor 25 if a negative fleece course 27 is present.
  • the rotating screw conveyor 25 and the housing 10 are extended beyond the spreading width, so that even after dosing, any excess particulate material (excess scattering particles) 28 can be discharged through an opening 29 in the housing outside the spreading width 24 and, for example, in the circuit back into the bunker 1 (Fig. 1) can be traced.
  • Fig. 3 shows the subject of the invention on an enlarged scale.
  • the closed particle stream 8 discharged from the scraper rollers 6 is transported between the front deflection 9 of the floor belt 3 and the housing 10.
  • the housing 10 has a circular part 30, in which a plurality of addition slides 26, adapted to the circular shape via the spreading width, can optionally close or open addition slots 31, depending on the information from the thickness measurement in the fleece.
  • the rotating screw conveyor 25 is provided as a conveyor.
  • the slide 22 lying in the plane of the drawing closes the removal slot 32
  • the open, open slide valve 22 behind it enters a partial particle flow 33 into the housing 10 and, as already described in relation to FIG.
  • Fig. 3 it can be seen that the housing 10 is arranged in the edge region of the expansion of the still closed particle flow in the nonwoven conveying direction.
  • a guide flap 34 is arranged in the area of the housing 10 and behind it, which causes the metered total particle flow to be deposited together in the fleece.
  • FIG. 4a shows the configuration of a housing in the form of a hexagon, in which parallel sides 35, 36 of the housing can optionally be closed and opened by slides 22 or addition slides 26.
  • Such a configuration of the housing simplifies the manufacture and adjustment of the mechanical guidance of the individually operable slides 22 and individually operable addition sliders 26.
  • FIG. 4b shows a square housing 10, in which the slides 22 and 26 selectively close or open adjacent sides 37, 38 which are provided with slots.
  • Such configurations are particularly suitable, as also shown in FIG. 1, for installations of the housing 10 and the conveying device 12 in the region of the transfer rollers 16 and opening rollers 15.
  • an oppositely coiled conveyor screw 40 is provided in the housing 10.
  • the oppositely coiled screw conveyor 40 can also be displaced by a dimension 41 from the center 42 of the spreading width 24.
  • the opposite spiral begins in the middle of the screw conveyor 40, so that to the left and right of the spreading width excess particle size material can be discharged from the housing 10 via openings 29.
  • a scraper conveyor 43 arranged in the housing 10 or a clearing belt 44 move as endless conveying members around two deflection points 45, 46.
  • the housing 10 has a slot in its bottom part 47 over the entire spreading width. This slot can be closed and opened by means of a plurality of addition slides 26 arranged over the bulk width.
  • the housing 10 Upstream, the housing 10 has, in a roof slope 48, a slot which extends over the entire spreading width and which can likewise be closed with a plurality of slides 22.
  • a decrease in particle material upstream and a particle addition downstream from the same particle stream can thus be controlled, so that a predetermined target density can be achieved in the fleece 20 over its spreading width 24.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
EP86100658A 1986-01-20 1986-01-20 Procédé pour uniformiser des particules de dispersion et machine pour exécuter ce procédé Expired - Lifetime EP0230483B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8686100658T DE3669838D1 (de) 1986-01-20 1986-01-20 Verfahren zum vergleichmaessigen von streupartikeln sowie eine vorrichtung zur durchfuehrung des verfahrens.
EP86100658A EP0230483B1 (fr) 1986-01-20 1986-01-20 Procédé pour uniformiser des particules de dispersion et machine pour exécuter ce procédé
US07/001,706 US4703783A (en) 1986-01-20 1987-01-09 Apparatus for equalizing the deposition of a particle mass

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86100658A EP0230483B1 (fr) 1986-01-20 1986-01-20 Procédé pour uniformiser des particules de dispersion et machine pour exécuter ce procédé

Publications (2)

Publication Number Publication Date
EP0230483A1 true EP0230483A1 (fr) 1987-08-05
EP0230483B1 EP0230483B1 (fr) 1990-03-28

Family

ID=8194836

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86100658A Expired - Lifetime EP0230483B1 (fr) 1986-01-20 1986-01-20 Procédé pour uniformiser des particules de dispersion et machine pour exécuter ce procédé

Country Status (3)

Country Link
US (1) US4703783A (fr)
EP (1) EP0230483B1 (fr)
DE (1) DE3669838D1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292581A1 (fr) * 1987-05-23 1988-11-30 Carl Schenck Ag Méthode pour répandre une nappe de copeaux
WO1996006715A1 (fr) * 1994-08-30 1996-03-07 Bau- Und Forschungsgesellschaft Thermoform Ag Procede et dispositif de dosage et de repartition d'un materiau a repandre, destines notamment a la production de panneaux de particules a liaison minerale
DE4345567B4 (de) * 1993-02-02 2005-03-03 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Streumaschine zum Streuen von beleimtem Streugut zu Streugutmatten in einer Anlage zur Herstellung von Holzwerkstoffplatten
CN103753686A (zh) * 2013-12-24 2014-04-30 上海人造板机器厂有限公司 一种具有可调节风门的铺装机的抛辊装置
DE102015113849A1 (de) * 2015-08-20 2017-02-23 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung, Verfahren und Anlage zur Herstellung einer Pressgutmatte
DE202018102823U1 (de) 2018-05-22 2019-08-26 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Streuung eines Vlieses auf einem Formband
EP3572197A1 (fr) 2018-05-22 2019-11-27 Dieffenbacher Gmbh Maschinen- Und Anlagenbau Dispositif et procédé d'étalement d'un non tissé sur une bande de formage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59608838D1 (de) * 1996-04-11 2002-04-11 Dieffenbacher Schenck Panel Verfahren zur kontinuierlichen Herstellung eines Vlieses für die Herstellung von Holzwerkstoff- oder ähnlichen Platten
WO2018224292A1 (fr) * 2017-05-19 2018-12-13 Dieffenbacher GmbH Maschinen- und Anlagenbau Trémie de dosage et poste de formage à utiliser dans la fabrication de panneaux de particules ou de panneaux de fibres et procédé d'introduction de particules dans la trémie de dosage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947640C (de) * 1952-04-09 1956-08-23 Max Himmelheber Dipl Ing Verfahren und Vorrichtung zur Herstellung von Holzspanplatten od. dgl.
DE1133532B (de) * 1956-01-16 1962-07-19 Fred Fahrni Vorrichtung zur Bildung eines Teilchen-Stromes konstanter Dicke, insbesondere aus mit Bindemitteln versetzten Holzteilchen, wie Spaenen, Schnitzeln od. dgl.
DE2528391B2 (de) * 1975-06-25 1978-08-31 Bison-Werke Baehre Und Greten Gmbh & Co Kg, 3257 Springe Beschickungsvorrichtung für einen Bodenband-Bunker, zur Aufnahme und Abfuhr von dem Herstellen von Faser-, Spanplatten o.dgl. dienenden Teilchen
EP0109456A1 (fr) * 1982-11-20 1984-05-30 Carl Schenck Ag Procédé et dispositif pour égaliser la distribution de densité dans un panneau de bois artificiel

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1840455A (en) * 1926-11-01 1932-01-12 Lea James Edward Apparatus for the measurement of granular materials
US2822024A (en) * 1956-01-16 1958-02-04 Allwood Inc Apparatus for manufacturing wood particle boards
US3146909A (en) * 1961-10-16 1964-09-01 Yawata Iron & Steel Co Feeding apparatus for powdery materials
US3557889A (en) * 1967-12-15 1971-01-26 Pillsbury Co Method for filling containers with predetermined quantities of material
US3513961A (en) * 1968-08-13 1970-05-26 Proctor & Schwartz Inc Spreader for particulate material
US4038531A (en) * 1976-05-18 1977-07-26 Weyerhaeuser Company Process control apparatus for controlling a particleboard manufacturing system
US4257518A (en) * 1978-10-25 1981-03-24 Stock Equipment Company Feeder for particulate material
DE3170270D1 (en) * 1981-07-04 1985-06-05 Schenck Ag Carl Method and apparatus for controlling the density distribution of a dispersed particle mat
JPS6050133B2 (ja) * 1981-11-05 1985-11-07 東芝機械株式会社 口金隙間調整方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947640C (de) * 1952-04-09 1956-08-23 Max Himmelheber Dipl Ing Verfahren und Vorrichtung zur Herstellung von Holzspanplatten od. dgl.
DE1133532B (de) * 1956-01-16 1962-07-19 Fred Fahrni Vorrichtung zur Bildung eines Teilchen-Stromes konstanter Dicke, insbesondere aus mit Bindemitteln versetzten Holzteilchen, wie Spaenen, Schnitzeln od. dgl.
DE2528391B2 (de) * 1975-06-25 1978-08-31 Bison-Werke Baehre Und Greten Gmbh & Co Kg, 3257 Springe Beschickungsvorrichtung für einen Bodenband-Bunker, zur Aufnahme und Abfuhr von dem Herstellen von Faser-, Spanplatten o.dgl. dienenden Teilchen
EP0109456A1 (fr) * 1982-11-20 1984-05-30 Carl Schenck Ag Procédé et dispositif pour égaliser la distribution de densité dans un panneau de bois artificiel

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292581A1 (fr) * 1987-05-23 1988-11-30 Carl Schenck Ag Méthode pour répandre une nappe de copeaux
US4931243A (en) * 1987-05-23 1990-06-05 Carl Schenck Ag Process and apparatus for spreading a chip web
DE4345567B4 (de) * 1993-02-02 2005-03-03 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Streumaschine zum Streuen von beleimtem Streugut zu Streugutmatten in einer Anlage zur Herstellung von Holzwerkstoffplatten
WO1996006715A1 (fr) * 1994-08-30 1996-03-07 Bau- Und Forschungsgesellschaft Thermoform Ag Procede et dispositif de dosage et de repartition d'un materiau a repandre, destines notamment a la production de panneaux de particules a liaison minerale
NL9401394A (nl) * 1994-08-30 1996-04-01 Thermoform Bau Forschung Werkwijze en inrichting voor het doseren en verdelen van stortmateriaal, in het bijzonder voor de produktie van mineraalgebonden houtspaanplaten.
US5854426A (en) * 1994-08-30 1998-12-29 Bau- Und Forschungsgesellschaft Thermoform Ag Method and apparatus for metering and distributing pouring material, especially for the production of mineral-bonded particle boards
CN103753686A (zh) * 2013-12-24 2014-04-30 上海人造板机器厂有限公司 一种具有可调节风门的铺装机的抛辊装置
CN103753686B (zh) * 2013-12-24 2015-12-09 上海人造板机器厂有限公司 一种具有可调节风门的铺装机的抛辊装置
DE102015113849A1 (de) * 2015-08-20 2017-02-23 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung, Verfahren und Anlage zur Herstellung einer Pressgutmatte
DE102015113849B4 (de) * 2015-08-20 2017-08-31 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung, Verfahren und Anlage zur Herstellung einer Pressgutmatte
DE202018102823U1 (de) 2018-05-22 2019-08-26 Dieffenbacher GmbH Maschinen- und Anlagenbau Vorrichtung zur Streuung eines Vlieses auf einem Formband
EP3572197A1 (fr) 2018-05-22 2019-11-27 Dieffenbacher Gmbh Maschinen- Und Anlagenbau Dispositif et procédé d'étalement d'un non tissé sur une bande de formage
CN110509392A (zh) * 2018-05-22 2019-11-29 迪芬巴赫机械工程有限公司 用于在成型带上散布料毡的设备和方法

Also Published As

Publication number Publication date
DE3669838D1 (de) 1990-05-03
EP0230483B1 (fr) 1990-03-28
US4703783A (en) 1987-11-03

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